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Moonlander

Moonlander

⚠️ WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

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Moonlander runs 4.8˝ tires on 100mm rims. Such a large footprint allows you to ride them at very low pressure, which (as with a snowshoe) enables unparalleled traction and float over all kinds of terrain…wet stuff, roots, rocks, pebbles, gravel, sand, and many types of snow. Moonlander, like its name implies, is meant to go beyond where normal bikes, even normal fat bikes, can go. It is designed from the ground up to ride where there are no roads, no trails and no people.

Like all of our framesets, Moonlander is made of 4130 CroMoly steel, with tubing designed specifically for this frame. The frame’s geometry is not unlike a standard mountain bike, with a bottom bracket height that supplies plenty of clearance for bushwhacking and monster-trucking while remaining low enough for a stable ride. The toptube maximizes standover height while keeping the headtube fairly high so you can set up your rig with a comfortable, all-day-grind riding position.

The frame features 135mm-spaced horizontal ‘dropouts’ with a derailleur hanger, meaning you can set it up as a singlespeed, with an internal gear hub, or standard derailleur drivetrain. The rear end is offset 28mm to allow the drivetrain and wide tires to play nicely together. Moonlanders come with a 135mm O.L.D. non-offset fork, but if you like being able to swap front and rear wheels you could get one matching the rear offset. The fork sports a 51mm I.S. disc caliper mount designed for a rear brake, and mid-blade thru-eyelets and lower rack barrels for mounting a fender and rack (you’ll probably need to alter something to fit, but the option is there should you choose to).

Specifications

Geometry

Geometry Diagram
SIZE Small (16) Medium (18) Large (20) xLarge (22) xxLarge (22L)
Reach 397.7 414.8 429.0 438.3 448.9
Stack 580.1 589.5 608.3 627.2 641.3
Head Tube Angle 70.5° 70.5° 70.5° 70.5° 70.5°
Head Tube Length 110.0 120.0 140.0 160.0 175.0
Seat Tube Length 406.4 457.2 508.0 558.8 558.8
BB Drop 60.0 60.0 60.0 60.0 60.0
Wheelbase 1073.4 1093.9 1114.8 1130.7 1146.4
Chainstay Length 450.0 450.0 450.0 450.0 450.0
Top Tube Length, Actual 555.2 570.8 590.2 607.3 620.6
Top Tube Length, Effective 575.0 595.5 615.0 630.0 645.0
Seat Tube Angle 73.0° 73.0° 73.0° 73.0° 73.0°
Standover Height 771.1 800.1 833.8 868.0 875.0
Fork Length 447.0 447.0 447.0 447.0 447.0
Fork Rake 43.0 43.0 43.0 43.0 43.0

All dimensions are preliminary and subject to change * Standover is measured from the top of the TT, at the center, with a tire measuring approximately Ø762mm

Frame Specs

  • Tubing: Surly 4130 CroMoly steel. Main triangle double-butted. TIG-welded. ED coated.
  • Rear Dropouts: Surly horizontal rear load, with derailleur hanger; 135mm O.L.D.; offset 28.0mm
  • Brake Compatibility: 51mm IS disc mounts frame and fork. NOTE: Unlike Pugsley, Moonlander uses front caliper adapters for the front brake and rear caliper adapters for the rear brake.
  • Braze-ons/extras: Dual water bottle mounts, Surly Trip Guide full line guides for brake and derailleurs, fender and rack eyelets
  • Seatpost Diameter: 27.2mm
  • Seatpost Clamp Diameter: 30.0mm (Surly stainless included)
  • Headset/Steerer Tube: 1-1/8" threadless
  • Front Derailleur Clamp Diameter: Direct mount 28.6mm diameter (adapter included, Moonlander specific)
  • Bottom Bracket Shell: 100mm wide, standard English threading (1.37" x 24t)
  • Chainring Clearance: 22/36t (NOTE: this is specific to using a Surly offset double crank—use of other cranks may limit number and size of rings and may cause tire/chain rub!)
  • Tire Clearance: 4.8" tires on 100mm rims, hell yes.
  • Fork: Tapered straight blade butted 4130 CroMoly. 51mm IS front disc mount. 135mm-spaced dropouts
  • Colors: Titanium Sand, Tractor Time